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Vulnerabilities

Vulnerability · CVE-2026-38728

An issue in Nodemailer smtp_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream._write, lib/smtp-stream.js components

Published May 15, 2026 · catalog updated Jun 17, 2026 · An issue in Nodemailer

Check if you run it

No confirmed exploitation is on record for CVE-2026-38728. EPSS is 0.75%. Act only if a listed version of An issue in Nodemailer is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (An issue in Nodemailer).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.75%
Remediation
Not established
Affected products
See sources for product scope

An issue in Nodemailer smtp_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream._write, lib/smtp-stream.js components

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-38728

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-38728. EPSS is 0.75%. Act only if a listed version of An issue in Nodemailer is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption. EPSS 0.75%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 15, 2026 · NIST NVD

    Detected

    An issue in Nodemailer smtp_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream._write, lib/smtp-stream.js components

  2. Jun 17, 2026 · NIST NVD

    Updated

    An issue in Nodemailer smtp_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream._write, lib/smtp-stream.js components

Sources

  • CVE.orgVulnerability recordCVE-2026-38728

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-38728

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2026-38728

    An issue in Nodemailer smtp_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream._write, lib/smtp-stream.js components

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.